John kubler



(No Model.)

J. KUBLER.

LOOK. No. 441,674. Patented Dec. 2, 1890.

Wfizwsw jnvenZ-or:

UNITED STATES PATENT OFFICE.

JOHN KUBLER, OF HOT SPRINGS, ARKANSAS, ASSIGNOR TO WILLIAM L. BABOOOK,OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 441,674, dated December2, 1890.

Application filed March 21, 1890.

To all whom it may concern.-

Be it known that I, JOHN KUBLER, a citizen of the United States,residing at Hot Springs, in the county of Garland and State of Arkansas,have invented certain new and useful Improvements in Locks, of which thefollowing is a specification.

My invention relates to locks, and has reference more particularly tothat class of locks in which the bolt comprises two hinged or pivotedmembers arranged to swing in the elongated slot 1), through which workthe bolt- I hooks B B of the lock.

These hooks B B are mounted upon a pin or stand 0, secured to the frontplate of the lock, and each is connected by means of a link 0 to a barD, adapted to lie flatly against and to slide upon the rear face of thefront plate A. The plate D is held in position upon the front plate A bymeans of suitable studs d, as is usual, and is guided so as to movealways in the same straight line toward and from the pin or stud c bymeans of a. stud e, which is straddled by the plate, as shown in Figs. 1and 2. That side of the plate D nearest the key-post f is notched, asindicated by the dotted lines in Fig. 1, to receive the bits of the key,as usual.

E indicates a tumbler pivoted at its lower end upon a pin or stud g, andprovided with a forwardly-projecting arm or spur h, which, when thehooks are closed, is immediately below a lug or projection 01, formedupon one side or edge of the plate D, the tumbler being held inengagement with the lug by means of a spring j, secured at one end tothe tumbler and bearing atits opposite ends against a screw-post K.

While I have shown only one tumbler, it is apparent that the number maybe increased, as desired. I

F indicates a plate having two slots Z Z to Serial No. 344,704. (Nomodel.)

receive the pivoted hooks B B, and an inter-I mediate cross-bar m, whichis designed to be engaged by the said hooks, as clearly shown in Fig. 1.

From the foregoing description it will be observed that during the firstpart of the movement of the key the tumbler will be swung backward uponits pivot g and the spurh on the tumbler removed from engagement withthe lug t' on the sliding plate D. As the movement of the key iscontinued the bits engage the notched side of the plate D and move saidplate downward, as indicated in Fig. 2, and it will be seen that as theplate thus moves downward it will, acting through the links 0 C, causethe hooks B B to move in the arc of a circle and out of engagement withthe cross-bar m of the plate F. It will be seen that when the parts arein this position the spur h of the tumbler is immediately above the lugt' of the sliding plate, this arrangement necessitating the use of a keyof the proper form to actuate the slide and bolt-hooks. To bring thehooks B B into locking position, it is necessary to move the tumblerbackward again upon its pivot, so as to allow the lug t' on the slidingplate D to pass by said spur, and as soon as the tumbler has been thusmoved laterally far enough the sliding bar is free to be raised bythebits of the key engaging its notched side.

Having thus described my invention, what I claim is- 1. In a lock, thecombination, with the front plate, of the pivoted hooks, thesliding-plate D, links connecting the plate with the hooks,

and a tumbler adapted to lock the plate against movement.

2. In a lock, the combination, with the front plate, of the pivotedhooks, the sliding plate provided with the lug 1) and connected with thehooks by means of links 0 O, and atum- J QHN KUBLER.

Witnesses:

. ROBT. MOFFAT, C. '1. TEAGUE.

